How to fix the Oracle error DGM-16903: Unable to connect to database?

In this post, you’ll learn more about the Oracle ErrorDGM-16903: Unable to connect to database with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

DGM-16903: Unable to connect to database

Reason for the Error DGM-16903: Unable to connect to database

The specified database was unreachable because it did not exist or was not started.

How to fix the Error DGM-16903: Unable to connect to database ?

You can fix this error in Oracle by following the below steps

Start the database or validate network connections and try again.